Wintry weather and icy roads are causing travel headaches in eastern South Dakota on Wednesday morning.

A semi-truck rolled on Interstate 29 at mile marker 48 around 9:30 a.m., blocking the northbound lanes of the interstate, the South Dakota Highway Patrol said. No one was injured, Highway Patrol spokesman Tony Mangan said.

Both lanes have been reopened, Mangan said.

Earlier, the patrol said on Twitter that northbound traffic was being redirected to exit 47 at Beresford.

Interstate 29 northbound at Mile Marker 48 is BLOCKED! Northbound traffic will need to exit at Beresford (Exit 47) Crews are working as quickly as possible to move the semi. pic.twitter.com/58hBISsSDR

Later, another semi-truck jackknifed on Interstate 29 at exit 36, near Volin, Mangan said. The semi went into a ditch and its trailer was blocking the southbound right lane. That crash was also cleared and the road reopened.

Icy roads are the primary symptom of Wednesday's weather, which caused the National Weather Service office in Sioux Falls to declare a winter weather advisory. While snowfall has been a dusting to less than an inch in most areas, the freezing rain that accompanies it is the biggest concern for travelers.

⚠️Winter Weather Advisory has been expanded further east into NW IA. Several reports of slick roads due to freezing rain across the area. Use caution if traveling! pic.twitter.com/qeBmBVvtWB